Richard Frotscher's almanac and garden manual for the southern states - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (R. Frotscher, 1889)

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Rivista di patologia vegetale - Istituto di patologia vegetale (Università di Milano) (Tipografia del Seminario, 1923)

Rivista Periodica dei Lavori della I.R. Accademia di Scienze, Lettere ed Arti di Padova - Accademia di scienze, lettere ed arti di Padova. (1855)

Rocks and soils : their origin, composition and characteristics ; chemical, geological and agricultural - Stockbridge, Horace E. (Horace Edward), 1857 -1930 (J. Wiley & sons, 1895)

Rodriguésia: Revista do Jardim Botânico do Rio de Janeiro (Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 1980)

Die Rohstoffe des Pflanzenreiches; Versuch einer technischen Rohstofflehre des Pflanzenreiches, unter Mitwirkung von Max Bamberger [et. el.] - Wiesner, Julius, 1838 -1916 (W. Engelmann, 1900)

Die rohstoffe des pflanzenreiches; versuch einer technischen rohstofflehre des pflanzenreiches - Wiesner, Julius, 1838 -1916 (W. Engelmann, 1903)

Die Rohstoffe des Pflanzenreiches; Versuch einer technischen Rohstofflehre des Pflanzenreiches - Wiesner, Julius, 1838 -1916 (W. Engelmann, 1914)

Die Rohstoffe des Pflanzenreichs : versuch einer Technischen Rohstofflehre des Pflanzenreiches - Wiesner, Julius, 1838 -1916 (W. Engelmann, 1921)

Rootrots and leafspots of grains and grasses in the northern Great Plains and western states - United States. Plant Disease Survey. (Plant Disease Survey, Division of Mycology and Disease Survey, Bureau of Plant Industry, Soils, and Agricultural Engineering, Agricultural Research Administration, United States Department of Agriculture, 1946)

Rostlinnictví : cili Návod k snadnému urcení a pojmenování rostlin v Cechách, Morave a jiných zemích Rakouského mocnárství domácích - Sloboda, Daniel. (V kommissí u Fr. Rivnáce, 1852)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1862)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1871)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1878)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1879)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1880)

Rural New Yorker - Moore, D. D. T. (Rural Pub. Co. [etc.], 1881)